CN211314981U - Worm gear assembly, EPS (electric power storage) speed reducing mechanism with worm gear assembly and vehicle - Google Patents

Abstract

The utility model discloses a worm gear subassembly and have its EPS reduction gears and vehicle. This worm gear subassembly includes: worm and worm wheel, the worm wheel with worm meshing transmission, just the inside grease chamber that holds the grease that is equipped with of worm wheel, be equipped with the intercommunication on the teeth of a cogwheel of worm wheel the oil duct in grease chamber works as the worm with during worm wheel meshing transmission, the grease is followed flow out in the oil duct, it is right the worm with worm wheel meshing position lubricates. According to the utility model discloses worm gear subassembly, through set up the grease chamber in the worm wheel, can hold the grease in the grease chamber, and be equipped with the oil duct in intercommunication grease chamber on the teeth of a cogwheel of worm wheel, when worm wheel and worm mesh the transmission, the oil duct on the teeth of a cogwheel of worm wheel can be followed to the grease in the grease chamber flows to lubricate the meshing flank of tooth between worm wheel and the worm, and then can prevent that jamming from appearing when the meshing of worm and worm wheel, guarantee that the cooperation stability of worm and worm wheel is good.

Description

Worm gear assembly, EPS (electric power storage) speed reducing mechanism with worm gear assembly and vehicle

Technical Field

The utility model relates to the technical field of vehicles, particularly, relate to a worm gear subassembly and have its EPS reduction gears and vehicle.

Background

In order to ensure stable meshing between the worm wheel and the worm, a lubricating mechanism is arranged in the worm wheel and worm assembly, so that lubricating oil is arranged between the worm wheel and the worm, but after the worm wheel and the worm are meshed for a long time, the surfaces of the worm wheel and the worm become smoother, so that the surface oil storage capacity of the worm wheel and the worm is weakened, and then clamping stagnation is easily caused between the worm wheel and the worm to cause abnormal sound.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the above-mentioned technical problem among the prior art to a certain extent at least. Therefore, the utility model provides a worm gear subassembly is equipped with the oil duct that can supply oil on the teeth of a cogwheel of this worm gear subassembly's worm wheel, can guarantee that the lubrication between worm wheel and the worm is good.

The utility model also provides a EPS reduction gears of having above-mentioned worm gear subassembly.

The utility model also provides a vehicle of having above-mentioned EPS reduction gears.

According to the utility model discloses worm gear subassembly includes: worm and worm wheel, the worm wheel with worm meshing transmission, just the inside grease chamber that holds the grease that is equipped with of worm wheel, be equipped with the intercommunication on the teeth of a cogwheel of worm wheel the oil duct in grease chamber works as the worm with during worm wheel meshing transmission, the grease is followed flow out in the oil duct, it is right the worm with worm wheel meshing position lubricates.

According to the utility model discloses worm gear subassembly, through set up the grease chamber in the worm wheel, can hold the grease in the grease chamber, and be equipped with the oil duct in intercommunication grease chamber on the teeth of a cogwheel of worm wheel, when worm wheel and worm mesh the transmission, the oil duct on the teeth of a cogwheel of worm wheel can be followed to the grease in the grease chamber flows to lubricate the meshing flank of tooth between worm wheel and the worm, and then can prevent that jamming from appearing when the meshing of worm and worm wheel, guarantee that the cooperation stability of worm and worm wheel is good.

According to the utility model discloses a some embodiments, a plurality of worm wheel all be provided with in the teeth of a cogwheel grease chamber, and a plurality of in the teeth of a cogwheel the grease chamber is linked together, has the grease chamber all be equipped with on two meshing tooth flanks of the teeth of a cogwheel the oil duct.

Further, each of the worm wheel all is provided with in the teeth of a cogwheel grease chamber, and each in the teeth of a cogwheel the grease chamber is linked together.

Specifically, the oil ducts are symmetrically arranged on two meshing tooth surfaces of the gear teeth, and one ends of the oil ducts, which are far away from the grease cavity, extend towards the direction of the worm.

Specifically, the oil hole of the oil passage on the tooth surface of the gear tooth is located at the meshing point of the tooth surface of the worm wheel.

According to some embodiments of the invention, the worm gear assembly further comprises: the worm wheel and the worm are located in the cavity of the shell.

According to another aspect of the utility model provides an EPS reduction gears, including foretell worm gear subassembly.

According to the utility model discloses vehicle of third aspect embodiment, including foretell EPS reduction mechanism.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic view of a worm gear assembly;

fig. 2 is an enlarged schematic view at a in fig. 1.

Reference numerals:

the worm and gear assembly 10, the worm 1, the worm wheel 2, the grease cavity 21, the oil passage 22, the oil hole 23, the shell 3, the clearance compensation groove 31, the gear groove 32, the clearance compensation mechanism 4 and the oscillating bearing 5.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The worm and gear assembly 10 according to an embodiment of the present invention is described in detail below with reference to fig. 1-2.

Referring to fig. 1 to 2, a worm and gear assembly 10 according to an embodiment of the present invention may include: worm 1 and worm wheel 2, worm wheel 2 and the transmission of worm 1 meshing, and worm wheel 2 inside is equipped with the grease chamber 21 that holds the grease, be equipped with the oil duct 22 that communicates grease chamber 21 on the teeth of a cogwheel of worm wheel 2, when worm 1 and the transmission of worm wheel 2 meshing, under worm wheel 2's centrifugal force effect, the grease flows out from oil duct 22, in order to lubricate worm 1 and the 2 meshing position of worm wheel, that is to say, when worm wheel 2 and worm 1 carry out the meshing transmission, the grease in grease chamber 21 can be followed the oil duct 22 on the teeth of a cogwheel of worm wheel 2 and flow out, thereby lubricate the meshing flank of tooth between worm wheel 2 and the worm 1, and then can prevent worm 1 and worm wheel 2 jamming from appearing when the meshing, guarantee that worm 1 and worm wheel 2's cooperation stability is good.

According to the utility model discloses worm gear subassembly 10, through set up grease chamber 21 in worm wheel 2, can hold the grease in grease chamber 21, and be equipped with the oil duct 22 in intercommunication grease chamber 21 on worm wheel 2's the teeth of a cogwheel, when worm wheel 2 meshes the transmission with worm 1, oil duct 22 on worm wheel 2's the teeth of a cogwheel can be followed to the grease in grease chamber 21 flows, thereby lubricate the meshing flank of tooth between worm wheel 2 and the worm 1, and then can prevent worm 1 and worm wheel 2 jamming from appearing when the meshing, guarantee that worm 1 and worm wheel 2's cooperation stability is good.

Further, all be provided with grease chamber 21 in a plurality of teeth of a cogwheel of worm wheel 2, and grease chamber 21 in a plurality of teeth of a cogwheel is linked together, all be equipped with oil duct 22 on two engaging tooth faces of the teeth of a cogwheel that have grease chamber 21, that is to say, grease chamber 21 is arranged in a plurality of teeth of a cogwheel 2, and communicate between a plurality of grease chambers 21, all be equipped with oil duct 22 on two engaging tooth faces of the teeth of a cogwheel that have grease chamber 21, in a specific embodiment, grease chamber 21 can be arranged with the spaced mode, for example, every interval one teeth of a cogwheel or two teeth of a cogwheel set up a grease chamber 21, therefore, when worm wheel 2 and worm 1 carry out the meshing transmission, wait for worm wheel 2 and worm 1 transmission after a period, can remain the lubricated grease when meshing with worm wheel 2 teeth of a cogwheel on the tooth face of worm 1, thereby can guarantee equally that the lubrication.

Further, as shown in fig. 1, each gear tooth of the worm wheel 2 is provided with a grease cavity 21, and the grease cavities 21 in the gear teeth are communicated, that is, each gear tooth of the worm wheel 2 is provided with a grease cavity 21 communicated with each other, therefore, when the worm wheel 2 and the worm 1 are in meshing transmission, the oil channels 22 on the gear teeth engaged with each other between the worm wheel 2 and the worm 1 can lubricate the tooth surfaces, so as to ensure good lubrication between the worm wheel 2 and the worm 1, and further ensure good working stability of the worm and gear assembly 10.

Specifically, as shown in fig. 2, the oil passages 22 on the two engaging flanks of the gear teeth having the grease chamber 21 are symmetrically arranged, and one end of the oil passage 22 remote from the grease chamber 21 extends in the direction of the worm 1, that is, the oil passages 22 on the two engaging flanks of the gear teeth having the grease chamber 21 are symmetrically arranged in a "eight" shape.

Specifically, the oil hole 23 of the oil passage 22 on the tooth surface of the gear tooth is located between the base circle and the addendum circle of the worm wheel 2, and in a specific embodiment, the junction point of the gear tooth of the worm wheel 2 and the tooth surface of the worm 1 is located on the pitch circle of the worm 1, so that when the worm 1 and the worm wheel 2 are in meshing transmission, the tooth surface of the worm 1 is in close contact with the gear tooth of the worm wheel 2, and therefore, the oil hole 23 of the oil passage 22 on the tooth surface of the gear tooth is located between the base circle and the addendum circle of the worm wheel 2, and an oil film can be formed on the tooth surface of the gear tooth on the worm wheel 2, so that the worm wheel.

Further, the oil hole 23 is located between the reference circle and the addendum circle of the worm wheel 2, and thus an oil film may be formed at a contact position of the worm wheel 2 and the worm 1, thereby ensuring high fitting stability of the worm wheel 2 and the worm 1.

According to some embodiments of the present invention, the worm and gear assembly 10 further comprises: the shell 3 and the shell 3 are sealed cavities, the worm wheel 2 and the worm 1 are located in the cavity of the shell 3, in a specific embodiment, the pressure in the shell 3 is constant, the grease cavity 21 of the worm wheel 2 is also a sealed cavity, the pressure in the grease cavity 21 is also constant, and when the worm 1 and the worm wheel 2 are static, the pressure in the grease cavity 21 and the pressure in the shell 3 maintain balance, so that when the worm wheel 2 and the worm 1 are meshed for transmission, grease in the grease cavity 21 flows out from the oil channels 22 due to centrifugal force, when a single gear tooth is meshed, redundant grease can be squeezed back to the oil channels 22, and therefore the grease in the grease cavity 21 can be enabled to circulate and return in the oil channels 22 on two sides of the gear tooth.

Specifically, when the worm wheel 2 is in meshing transmission with the worm 1, the oil passage 22 at one end of the pre-meshed gear teeth close to the worm 1 discharges oil under the action of centrifugal force to lubricate the tooth surfaces of the gear teeth, so that good lubrication of the meshing process of the gear teeth of the worm wheel 2 and the worm 1 is ensured, when the gear teeth are completely meshed with the worm 1, redundant grease flowing out of the oil passage 22 of the gear teeth is extruded at the tooth tops of the gear teeth and the tooth roots of the tooth surfaces of the worm 1, and when the gear teeth start to be separated, the redundant grease is extruded back to the oil passage 22 at the other end of the gear teeth, so that the grease circulation backflow of a single grease cavity 21.

Specifically, the worm wheel 2 is provided with an oil filling hole 23, the oil filling hole 23 is communicated with one of the grease cavities 21, or the oil passage 22 can also serve as the oil filling hole 23, so that grease in the grease cavity 21 can be supplemented in time.

Further, as shown in fig. 1, the worm and gear assembly 10 may further include: the clearance compensation mechanism 4 is provided with a clearance compensation groove 31 in the shell 3, the clearance compensation mechanism 4 is arranged between the clearance compensation groove 31 and the other end of the worm 1, the clearance compensation mechanism 4 has thrust towards the direction of the worm wheel 2 to the worm 1, and the clearance between the worm wheel 2 and the worm 1 can be eliminated by arranging the clearance compensation mechanism 4, so that the precision and the high transmission efficiency of transmission between the worm wheel 2 and the worm 1 are ensured.

As shown in fig. 1, the worm gear assembly 10 may further include: the oscillating bearing 5, the housing 3 is equipped with the gear tooth groove 32 suitable for installing the oscillating bearing 5, the oscillating bearing 5 is located in the gear tooth groove 32, and one end of the worm 1 is fixedly connected with the inner ring of the oscillating bearing 5, when the worm wheel 2 and the worm 1 jump relatively, the worm 1 can drive the oscillating bearing 5 to jump, thereby ensuring that the transmission between the worm wheel 2 and the worm 1 is tight.

According to another aspect of the present invention, an EPS deceleration mechanism includes the worm gear assembly 10.

According to the utility model discloses vehicle of third aspect embodiment, including foretell EPS reduction mechanism.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (8)

1. A worm and gear assembly, comprising:

a worm;

the worm wheel, the worm wheel with worm meshing transmission, just the inside grease chamber that holds the grease that is equipped with of worm wheel, be equipped with the intercommunication on the teeth of a cogwheel of worm wheel the oil duct in grease chamber works as the worm with during worm wheel meshing transmission, the grease is followed flow out in the oil duct, it is right the worm with worm wheel meshing position lubricates.

2. The worm and gear assembly as recited in claim 1, wherein the grease chamber is disposed in each of the plurality of gear teeth of the worm wheel, the grease chambers in the plurality of gear teeth are in communication, and the oil passages are disposed on both engaging flanks of the gear teeth having the grease chambers.

3. The worm and gear assembly as recited in claim 2, wherein the grease cavity is disposed in each of the gear teeth of the worm gear and the grease cavities in each of the gear teeth are in communication.

4. The worm and gear assembly according to claim 2 or 3, wherein the oil passages on two meshing tooth surfaces of the gear teeth with the grease cavity are symmetrically arranged, and one end of each oil passage far away from the grease cavity extends towards the direction of the worm.

5. The worm-gear assembly according to claim 2 or 3, wherein the oil passage is located at an engagement point of the worm-gear tooth face at the oil hole on the tooth face of the gear tooth.

6. The worm-gear assembly as recited in claim 1, further comprising: the worm wheel and the worm are located in the cavity of the shell.

7. An EPS reduction mechanism characterized by comprising the worm gear assembly of any one of claims 1 to 6.

8. A vehicle characterized by comprising the EPS deceleration mechanism according to claim 7.

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